Electrophysiological and chemical analysis of sex pheromone communication system of the mottled umber,Erannis defoliaria (Lepidoptera: Geometridae) |
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Authors: | Bill S. Hansson Gabor Szöcs Frank Schmidt Wittko Francke Christer Löfstedt Miklos Tóth |
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Affiliation: | (1) Department of Ecology, Lund University, S-223 62 Lund, Sweden;(2) Research Institute for Plant Protection of the Hungarian Academy of Sciences, Pf 102, H-1525 Budapest, Hungary;(3) Institut für Organische Chemie der Universität Hamburg, Martin-Luther-King-Platz 6, D-2000 Hamburg 13, Germany |
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Abstract: | (Z,Z,Z)-3,6,9-nonadecatriene (Z3,Z6,Z9–19Hy) and (Z,Z)-3,9-cis-6,7-epoxy-nonadecadiene (Z3,Z9-cis-6,7-epo-19Hy) were identified in pheromone gland extracts from femaleErannis defoliaria. The two components were found in a 13 ratio, with the main component,Z3,Z9-cis-6,7-epo-19Hy present at an amount of about 1.5 ng per female. The components were identified by means of gas chromatography-mass spectrometry, gas chromatography-electroantennography and gas chromatography-single sensillum recordings. Single sensillum measurements on the male antenna showed two physiological types of sensilla. One type was characterized by a large spike amplitude cell responding toZ3,Z9-cis-6,7-epoxy-19Hy and a small spike amplitude cell responding toZ3,Z6,Z9–19Hy. A second type responded only with a large spike amplitude cell to the epoxide, and this cell was inhibited by the triene. Of the two pheromone components, the epoxide gave the higher response in the EAG tests. Preliminary field tests support the identification of the pheromone components. The epoxide was also found to be present in the extract of the pheromone gland ofColotois pennaria, and males ofC. pennaria andAgriopis marginaria were trapped by the mixture of the identified compounds. |
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Keywords: | Erannis defoliaria (Z,Z,Z)-3,6,9-nonadecatriene (Z,Z)-3,9-cis-6,7-epoxy-nonadecadiene sex pheromone identification electroantennogram single sensillum peripheral inhibitor Agriopis marginaria Colotois pennaria Lepidoptera Geometridae |
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